# pr0rider

Block user

## Recent

pr0rider sarahmoore's article
Aug 16, 2019 at 3:52
Aug 16, 2019
Oct 31, 2018 at 16:09
Oct 31, 2018
pr0rider pinkbikeaudience's article
Jun 7, 2017 at 23:52
Jun 7, 2017
Pivot - UCI World Cup DH Fantasy Contest - Rd 3, Leogang 2017
1. GWIN 2. MINAAR 3. BRUNI 1. Hannah 2. Seagrave 3. Nicole
pr0rider pinkbikeaudience's article
Sep 9, 2016 at 14:59
Sep 9, 2016
Pivot - UCI World Champs DH - Val di Sole Fantasy Contest
Men : 1- Aaron Gwin 2- Danny Hart 3- Troy Brosnan Women : 1- Rachel Atherton 2- Manon Carpenter 3- Myriam Nicole
pr0rider pinkbikeaudience's article
Sep 2, 2016 at 5:11
Sep 2, 2016
Canyon - UCI WC DH - Vallnord Fantasy Contest
1. Loic Bruni 2. Damn Daniel Hart 3. Aaron Gwin 1. Rachel Atherton 2. Tahnee Seagrave 3. Manon Carpenter
pr0rider pinkbikeaudience's article
Jul 8, 2016 at 8:02
Jul 8, 2016
Radon Bikes UCI World Cup Downhill Lenzerheide Fantasy Contest
1st Aaron Gwin 2nd Greg Minaar 3rd Troy Brosnan 1st Rachel Atherton 2nd Tahnee Seagrave 3rd Manon Carpenter
pr0rider pinkbikeaudience's article
Jul 8, 2016 at 2:00
Jul 8, 2016
Stages Cycling - UCI WC DH - Leogang Power Competition Winner
I did some calculations. Assumptions: r=0.17m, 1 pedal turn per second n=1/s, P=1965 It takes constantly 188kg on the pedal to get this enormous power. In reality the force/mass on the pedal is not constant so it gets a bit tricky ... The torque is the cross product Fxr. Assuming a vertical force on the pedal, the torque will be T=F*r*cos(alpha). Because of the 2 pedals the torque is T=F*r*|cos(a)|, where |x| is the abs function. The average value of abs(cos(a)) is the integral from 0 to 2pi divided by 2pi, which is 0,637. So the average mass value Mave=188kg is 63,7% of the maximum value. So my conclusion is that the maximum weight on the pedal has to be 295 kg. ----- I wonder how a 70-80 kg person should bring nearly 300kg on the pedal!
pr0rider pinkbikeaudience's article
Jul 8, 2016 at 1:09
Jul 8, 2016
Stages Cycling - UCI WC DH - Leogang Power Competition Winner
You're totally right. These values feel wrong so i checked the tech info (http://stagescycling.com/de/technology/). It looks as if they average the force of one pedal turn. Since only one leg is measured, they double the force. The provided formulas look very strange to me. The power of a drive shaft should be calculated P=2*pi*F*r*n. I wonder why they use the gravitational constant g - makes no sense here. In Addition, strain gauges in bridge circuit, probably wheatstone bridge, can easily cause wrong values. In highly dynamic cases, the evaluation isn't very reliable.
pr0rider pinkbikeaudience's article
Jun 15, 2016 at 14:38
Jun 15, 2016
Stages Cycling - UCI WC DH - Leogang Power Competition
https://youtu.be/S4O5voOCqAQ 700 Watt ...
pr0rider pinkbikeaudience's article
Jun 15, 2016 at 14:33
Jun 15, 2016
Stages Cycling - UCI WC DH - Leogang Power Competition
2.2 kW is equal to 3 bhp - i would doubt that. Unless Gee is horse enough :P